Class | Rack::URLMap |
In: |
lib/rack/urlmap.rb
|
Parent: | Object |
Rack::URLMap takes a hash mapping urls or paths to apps, and dispatches accordingly. Support for HTTP/1.1 host names exists if the URLs start with http:// or https://.
URLMap modifies the SCRIPT_NAME and PATH_INFO such that the part relevant for dispatch is in the SCRIPT_NAME, and the rest in the PATH_INFO. This should be taken care of when you need to reconstruct the URL in order to create links.
URLMap dispatches in such a way that the longest paths are tried first, since they are most specific.
# File lib/rack/urlmap.rb, line 15 15: def initialize(map) 16: @mapping = map.map { |location, app| 17: if location =~ %r{\Ahttps?://(.*?)(/.*)} 18: host, location = $1, $2 19: else 20: host = nil 21: end 22: 23: location = "" if location == "/" 24: 25: [host, location, app] 26: }.sort_by { |(h, l, a)| -l.size } # Longest path first 27: end
# File lib/rack/urlmap.rb, line 29 29: def call(env) 30: path = env["PATH_INFO"].to_s.squeeze("/") 31: @mapping.each { |host, location, app| 32: if (env["HTTP_HOST"] == host || 33: env["SERVER_NAME"] == host || 34: (host == nil && (env["HTTP_HOST"] == env["SERVER_NAME"] || 35: env["HTTP_HOST"] == 36: "#{env["SERVER_NAME"]}:#{env["SERVER_PORT"]}"))) && 37: location == path[0, location.size] && (path[location.size] == nil || 38: path[location.size] == ?/) 39: env["SCRIPT_NAME"] = location.dup 40: env["PATH_INFO"] = path[location.size..-1] 41: env["PATH_INFO"].gsub!(/\/\z/, '') 42: env["PATH_INFO"] = "/" if env["PATH_INFO"].empty? 43: return app.call(env) 44: end 45: } 46: [404, {"Content-Type" => "text/plain"}, ["Not Found: #{path}"]] 47: end